\( Y, k, n \) represent respectively the youngs modulus, bulk modulus and rigidity modulus of a ...

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\( Y, k, n \) represent respectively the youngs modulus, bulk modulus and rigidity modulus of a body. If rigidity modulus is twice the bulk modulus, then
(a) \( Y=5 k / 18 \)
(b) \( Y=5 n / 9 \)
(c) \( Y=9 k / 5 \)
(d) \( Y=18 k / 5 \)
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